How to 'getConstructor' where constructor signature contains java array

Question

Is it possible to use getConstructor to obtain the constructor of the class X below?

public class A {
}

public class Y {

}

public class X extends Y {
    public X(A a, Y[] yy) {

    }
    public void someMethod() throws SecurityException, NoSuchMethodException {
        Class<? extends Y> clazz = X.class;
        Constructor<? extends Y> c =
            clazz.getConstructor(new Class[]{
                        A.class,
                        /* what do I put in here for the array of Ys? */
                    });
    }
}

Thanks

Hyque · Accepted Answer · 2010-01-17 10:19:53Z

7

You can construct class literals involving array notation just like you would with "undecorated" classes, namely ClassName[].class. This literal yields "the class which describes arrays of instances of ClassName". In your case:

clazz.getConstructor(new Class[] {
    A.class,
    Y[].class
 });

answered Jan 17, 2010 at 10:19

Hyque

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Comments

Peter Lawrey · Accepted Answer · 2010-01-17 11:52:19Z

6

Or shorter.

    Constructor<X> c = X.class.getConstructor(A.class, Y[].class);

answered Jan 17, 2010 at 11:52

Peter Lawrey

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